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Interval information
Ratio 25/22
Factorization 2-1 × 52 × 11-1
Monzo [-1 0 2 0 -1
Size in cents 221.30949¢
Names ptolemismic whole tone,
undecimal acute whole tone
Color name 1uyy2, luyoyo 2nd
FJS name [math]\text{A2}^{5,5}_{11}[/math]
Special properties reduced
Tenney height (log2 nd) 9.10329
Weil height (log2 max(n, d)) 9.28771
Wilson height (sopfr (nd)) 23
Harmonic entropy
(Shannon, [math]\sqrt{nd}[/math])
~4.19865 bits

[sound info]
open this interval in xen-calc

25/22, the ptolemismic whole tone or undecimal acute whole tone, is an 11-limit interval. It is sharp of 9/8, the Pythagorean whole tone, by 100/99, the ptolemisma, hence the name. It is also flat of 8/7, the septimal major second, by 176/175, the valinorsma. Another interval close to it but simpler is 17/15, from which it is separated by 375/374.

See also